Heater Core Help

Frankenstang65 · 01-05-2002, 05:29 AM

Do any of you guys know if there is a heavier duty heater core that can be installed in 65 mustang? For some reason, the stock unit can not stand the pressure when my motor is at 4500 rpm+. I've blown two in the last couple of months and am wondering if you have any ideas about what I could do to keep this from happening again.

Thanks in advance

Gearhead999 · 01-05-2002, 08:21 AM

Never heard of a heavy duty heater core, but Ford did make little restrictors that you would put in the heater core inlet hose to stop the core from bursting. I think there was a TSB on it. On Mustangs either later 80's or early 90's.

Idhomustang · 01-05-2002, 04:43 PM

Wow,
I would change brands or at least install a guage on your heater core lines that is unusual. I would have some concerns about that for sure. You might drill a small hole in your thermostat and thry and relieve some of the pressure that way. I would try a different brand first stay with a big name company like stant or gates. It should hold about 15 or so pounds pressure. Most radaitor caps are rated around that pressure for relief..
I know that on the later model engines ford installed a metal tube but it served many other purposes, like providing protection because of heat and moving parts.

Mac..

01-05-2002, 05:29 AM	#1
Frankenstang65 Registered Member Join Date: Sep 2001 Location: Seattle, WA Posts: 79	Heater Core Help Do any of you guys know if there is a heavier duty heater core that can be installed in 65 mustang? For some reason, the stock unit can not stand the pressure when my motor is at 4500 rpm+. I've blown two in the last couple of months and am wondering if you have any ideas about what I could do to keep this from happening again. Thanks in advance __________________ 1965 Coupe: 351W, comp cam, Aluminum Systemax II heads (2.02/1.60), 1.7 Cobra full roller rockers, Edelbrock intake, Holley 650 double pumper, Mallory Unilite, MSD-6AL, MSD Blaster 2 coil, MSD heli-core plug wires, Hedman headers, 2 1/2" exhaust (GT style) w/ 40 series delta flows, 69 C4 w/ shift kit, shelby traction bars, 3.55:1 rear Daily Driver: 1989 GT- 5spd, K&N (no silencer), Shorty Headers, King Cobra Clutch, Flowmaster Force II Cat-back

01-05-2002, 08:21 AM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Never heard of a heavy duty heater core, but Ford did make little restrictors that you would put in the heater core inlet hose to stop the core from bursting. I think there was a TSB on it. On Mustangs either later 80's or early 90's. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

01-05-2002, 04:43 PM	#3
Idhomustang Registered Member Join Date: Sep 1999 Location: boise,idaho Posts: 220	Huh? Wow, I would change brands or at least install a guage on your heater core lines that is unusual. I would have some concerns about that for sure. You might drill a small hole in your thermostat and thry and relieve some of the pressure that way. I would try a different brand first stay with a big name company like stant or gates. It should hold about 15 or so pounds pressure. Most radaitor caps are rated around that pressure for relief.. I know that on the later model engines ford installed a metal tube but it served many other purposes, like providing protection because of heat and moving parts. Mac.. __________________ 393,9.5" 351W,830 Holley,Victor Jr,Home made Cool Air Pan, Pro Billet MSD, MSD 6AL, XE 284H Xtr-Com cam, 240-246 @.050, 540-544, M/T Et streets, Mac Upper and Lower, Control Arms, 3:73 US Gear,Mini Spool, Eagle Long rods, Mac Windage tray, KB Pistons, Scat crank, 4000 rpm stall convertor, C-4 trans, Airflow Research 185cc, Hooker long tubes 3", exhaust, S&W 6 point roll cage, 11.2 at 121 mph.

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